Wejsuny was formerly part of the German Empire. In the German Empire, the place was called Weissuhnen.
The place is now called Wejsuny and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Weissuhnen | German Empire | Johannisburg | 1939 |
| Wejsuny | Under Polish administration | Pisz | 1945 |
| Wejsuny | Poland | Suwałki | 1992 |